APBMW S8-4
SUBWOOFER FOR BMW-MINI

Subwoofers have been designed with electro-acoustic parameters that maximize performance for the factory box available below the seats. The ABS plastic basket, reinforced with fiberglass, and the acoustic structure featuring a front magnet, provide for a minimal installation depth for a perfect compatibility with the whole range. Two 5 mm polyurethane gaskets, supplied, allow the subwoofer to fit perfectly to the box, decoupling it from vibration.

The 200 mm (8") APBMW S subwoofers allow a “direct replacement” of the OEM speakers underneath the front seats, making the most of the factory acoustic load and generating deep and crisp low frequencies. You can choose between S8-2 with 2 ohm impedance and S8-4 with 4 ohm impedance for improved system composition versatility. In fact, in the mid-high passive filtered system configuration, with the crossover provided, 4 of the 8-channels of the AP 8.9 bit can be configured in bridge mode delivering 130W rms to each S8-4 installed under the seat. The S8-2 can be used in a fully active, multi-amplified front system, maximizing the power of the AP 8.9 bit at 2 ohms, and employing additional 2 channels for the rear system. The Neodymium magnet used on S8-4 and S8-2 allows for greater power and control than ferrite, while maintaining the depth of installation unaltered.

TECHNICAL SPECIFICATIONS
Component Woofer
Size mm (in.) 200 (8)
Power Handling W peak
W continuos
300
150
Impedance O 4
Frequency Response Hz 35 ÷ 500
Magnet size D x d x h mm
(in.) 48 (1.89) x 18 (0.71) x 7 (0.28)
Weight of one speaker kg (lb.) 1,21 (2.67)
Voice Coil Ø mm (in.) 50 (2)
ELECTRO-ACOUSTIC PARAMETERS
D mm 159
Xmax mm ±7
Re O 3,8
Fs Hz 40
Le mH 0,6
Vas I 21
Mms g 43
Cms mm/N 0,38
BL T•m 6
Qts 0,72
Qes 1,14
Qms 2

1 Developed with electroacoustic parameters customized for
BMW-Mini to increase listening engagement, through
powerful and crisp low frequencies, exploiting the
acoustic load provided by the factory box;
2 Neodymium Magnetic group with an inverted acoustic
structure featuring an internal cone, to maximize performance
while minimizing bulk and weight;
3 38 mm voice coil wound on aluminium support for a
considerable power dissipation and stability even during high
excursions;
4 Two 5 mm gaskets provided for OEM placements;
5 4 ohm configuration for maximum output in combination
with the AP 8.9 bit 4 channels bridged.
Spl dB 88